scholarly journals Surface plasmon optical study of the interfacial phase transition of elastinlike polypeptide grafted on gold

2008 ◽  
Vol 3 (3) ◽  
pp. 66-74 ◽  
Author(s):  
Fei Xu ◽  
Huang Min Joon ◽  
Kimberly Trabbic-Carlson ◽  
Ashutosh Chilkoti ◽  
Wolfgang Knoll
Keyword(s):  
Phase Transition ◽  
Surface Plasmon ◽  
Optical Study ◽  
Interfacial Phase

PRELIMINARY OPTICAL STUDY ON ER FLUIDS

1994 ◽  
Vol 08 (20n21) ◽  
pp. 2921-2933 ◽  
Author(s):  
L. W. ZHOU ◽  
J. F. YE ◽  
R. B. TAO ◽  
Y. TANG ◽  
J. F. PENG ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electric Field ◽  
Electric Fields ◽  
Nonlinear Optical ◽  
Second Harmonic ◽  
Optical Response ◽  
Optical Study ◽  
Solid States ◽  
Linear And Nonlinear ◽  
Er Fluids

Linear and nonlinear optical study on electrorheological (ER) fluids is reported. The ER fluids under the investigation were glass beads, zeolite and ferroelectrics. The linear optical response of some ER fluids showed sharp changes near critical electric fields. An enhancement of electric field induced second harmonic generations (EFISH) was observed as the function of E2, where E is the external electric field. The said enhancement is considered to be corresponding to a modulation of the material's refractive index associated with the electric field induced polarization of the delocalized electrons. The enhanced nonlinear optical response on the transition between liquid and solid states can be related to the phase transition in ER fluids.

scholarly journals Crystallographic and optical study of LiNb1 − xTaxO3

2017 ◽  
Vol 73 (3) ◽  
pp. 498-506 ◽  
Author(s):  
S. Huband ◽  
D. S. Keeble ◽  
N. Zhang ◽  
A. M. Glazer ◽  
A. Bartasyte ◽  
...  
Keyword(s):  
Phase Transition ◽  
Lithium Niobate ◽  
Lithium Tantalate ◽  
Flux Growth ◽  
Structural Studies ◽  
Optical Study ◽  
X Ray Diffraction ◽  
Growth Technique ◽  
X Ray ◽  
Li Content

Powders of lithium niobate-tantalate across the full compositional range have been made and crystals grown using a lithium vanadate flux growth technique. The Li-content of a lithium tantalate crystal has been determined using the zero-birefringence temperature and Curie measurements, confirming the Li content is between that of congruent and stoichiometric crystals. X-ray diffraction measurements show the Nb/Ta displacement and octahedral tilt both decrease as the Ta content is increased. This also results in a decrease in the lattice parameters from lithium niobate to lithium tantalate. Birefringence measurements on the crystals as a function of temperature have been used to determine the point that the crystals become zero-birefringent, and by comparison with the structural studies have confirmed that it is not related to a phase transition and the structures remain polar through the zero-birefringence points.

Optical Study of the Phase Transition in Phenanthrene Single Crystals

1974 ◽  
Vol 29 (1) ◽  
pp. 151-154 ◽  
Author(s):  
L. J. Soltzberg ◽  
Pamela A. Piliero ◽  
Madilyn R. Shea
Keyword(s):  
Phase Transition ◽  
Single Crystals ◽  
Optical Study

scholarly journals Fluctuation adsorption theory: quantifying adsorbate–adsorbate interaction and interfacial phase transition from an isotherm

2020 ◽  
Vol 22 (48) ◽  
pp. 28304-28316
Author(s):  
Seishi Shimizu ◽  
Nobuyuki Matubayasi
Keyword(s):  
Phase Transition ◽  
Adsorption Isotherm ◽  
Thermodynamic Theory ◽  
Statistical Thermodynamic ◽  
Adsorption Theory ◽  
Interfacial Phase

Adsorbate–adsorbate interaction can be determined directly from an adsorption isotherm via a rigorous statistical thermodynamic theory.

scholarly journals Optical Study of Electronic Structure and Photoinduced Dynamics in the Organic Alloy System [(EDO-TTF)0.89(MeEDO-TTF)0.11]2PF6

2019 ◽  
Vol 9 (6) ◽  
pp. 1174 ◽  
Author(s):  
Tadahiko Ishikawa ◽  
Yohei Urasawa ◽  
Taiki Shindo ◽  
Yoichi Okimoto ◽  
Shin-ya Koshihara ◽  
...  
Keyword(s):  
Phase Transition ◽  
Electronic Structure ◽  
Absorption Spectra ◽  
Structural Changes ◽  
Alloy System ◽  
Charge Ordering ◽  
Center Frequency ◽  
Relaxation Processes ◽  
Optical Study ◽  
Small Shift

Over the past two decades (EDO-TTF)2PF6 (EDO-TTF = 4,5-ethylenedioxytetrathiafulvalene), which exhibits a metal–insulator (M–I) phase transition with charge–ordering (CO), has been investigated energetically because of attractive characteristics that include ultrafast and massive photoinduced spectral and structural changes. In contrast, while its crystal structure has much in common with the (EDO-TTF)2PF6 crystal, the organic alloy system of [(EDO-TTF)0.89(MeEDO-TTF)0.11]2PF6 (MeEDO-TTF = 4,5-ethylenedioxy-4′-methyltetrathiafulvalene) exhibits a quite different type of M–I phase transition that is attributed to Peierls instability. Here, an optical study of the static absorption spectra and the time-resolved changes in the absorption spectra of [(EDO-TTF)0.89(MeEDO-TTF)0.11]2PF6 are reported. The observed absorption spectra related to the electronic structure are highly anisotropic. With a reduction in temperature (T), the opening of a small optical gap and a small shift in the center frequency of the C=C stretching mode are observed along with the M–I phase transition. Additionally, photoinduced transient states have been assigned based on their relaxation processes and transient intramolecular vibrational spectra. Reflecting small valence and structural changes and weak donor–anion interactions, a photoinduced transient state that is similar to the thermal-equilibrium high-T metallic phase appears more rapidly in the alloy system than that in (EDO-TTF)2PF6.

Nonlinear optical study of the Si(111)7×7 to 1×1 phase transition: Superheating and the nature of the 1×1 phase

1995 ◽  
Vol 52 (7) ◽  
pp. 5264-5268 ◽  
Author(s):  
U. Höfer ◽  
Leping Li ◽  
G. A. Ratzlaff ◽  
T. F. Heinz
Keyword(s):  
Phase Transition ◽  
Nonlinear Optical ◽  
Optical Study

Optical study of the antiferromagnetic phase transition in (Cd,Mn)S at highest Mn concentration

1990 ◽  
Vol 101 (1-4) ◽  
pp. 911-915 ◽  
Author(s):  
W. Heimbrodt ◽  
C. Benecke ◽  
O. Goede ◽  
H.-E. Gumlich
Keyword(s):  
Phase Transition ◽  
Antiferromagnetic Phase ◽  
Optical Study ◽  
Mn Concentration
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